在java中获取当前月份的第一个日期

问题描述

我正在尝试往返日期，其中 ToDate 将具有上一个日期，而 FromDate 将具有当月的第一个日期.对于 1 月，它将是 1/1/2013 等等.如何正确获取当月的第一个日期?我做不到.

I am trying to get to and from date where ToDate will have previous date and FromDate will have first date of the current month. For January it would be 1/1/2013 and so on. How to get the first date of the current month correctly? I am not able to do it.

today.add(Calendar.DAY_OF_MONTH, -1);
java.util.Date previousDay=today.getTime();
ToDate = sdfFile1.format(newjava.sql.Date(previousDay.getTime()));
today.add(Calendar.DATE, 1);
java.util.Date nextDay=today.getTime();
FromDate = sdfFile1.format(new java.sql.Date(nextDay.getTime()));

推荐答案

试试

    Calendar c = Calendar.getInstance();   // this takes current date
    c.set(Calendar.DAY_OF_MONTH, 1);
    System.out.println(c.getTime());       // this returns java.util.Date

已更新(自 Java 8):

import java.time.LocalDate;
LocalDate todaydate = LocalDate.now();
System.out.println("Months first date in yyyy-mm-dd: " +todaydate.withDayOfMonth(1));

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